WndProc.c File Reference

#include "precomp.h"

Include dependency graph for WndProc.c:

Go to the source code of this file.

Macros
#define	WMPAINT_COUNT_THRESHOLD   10

Functions
static LRESULT WINAPI	redraw_window_procA (HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
static void	test_wndproc (void)
static void	test_get_wndproc (void)
	START_TEST (WndProc)

Variables
static int	redrawComplete
static int	WMPAINT_count

Macro Definition Documentation

WMPAINT_COUNT_THRESHOLD

#define WMPAINT_COUNT_THRESHOLD   10

Definition at line 12 of file WndProc.c.

Function Documentation

redraw_window_procA()

static LRESULT WINAPI redraw_window_procA ( HWND  hwnd, UINT  msg, WPARAM  wparam, LPARAM  lparam  )

static

Definition at line 24 of file WndProc.c.

{
    switch (msg)
    {
        case WM_PAINT:
            break;
            WMPAINT_count++;
            trace("Doing WM_PAINT %d/%d\n", WMPAINT_count, WMPAINT_COUNT_THRESHOLD);
 
            if (WMPAINT_count > WMPAINT_COUNT_THRESHOLD && redrawComplete == 0)
            {
                PAINTSTRUCT ps;
 
                trace("Calling *Paint()\n");
                BeginPaint(hwnd, &ps);
                EndPaint(hwnd, &ps);
                return 1;
            }
 
            // This will force one stack corruption "ret" fault with normal window
            // procedure callback.
#ifdef __MINGW32__
            trace("Executing __MINGW32__ stack corruption code\n");
            asm ("movl $0, %eax\n\t"
                 "leave\n\t"
                 "ret");
#elif defined(_M_IX86)
//#ifdef _MSC_VER
            trace("Executing MSVC x86 stack corruption code\n");
            __asm
              {
                 mov eax, 0
                 leave
                 ret
              }
#else
            ok(FALSE, "FIXME: stack corruption code is unimplemented\n");
#endif
 
            break;
        default:
            trace("Doing empty default: msg = %u\n", msg);
    }
 
    trace("Calling DefWindowProc()\n");
    return DefWindowProc(hwnd, msg, wparam, lparam);
}

Referenced by test_wndproc().

START_TEST()

START_TEST

(

WndProc

)

Definition at line 159 of file WndProc.c.

{
#ifdef __RUNTIME_CHECKS__
    skip("This test breaks MSVC runtime checks!\n");
    return;
#endif /* __RUNTIME_CHECKS__ */
 
    test_get_wndproc();
    test_wndproc();
}

test_get_wndproc()

static void test_get_wndproc ( void  )

static

Definition at line 138 of file WndProc.c.

{
    LONG_PTR ret;
    SetLastError(0xfeedf00d);
    ret = GetWindowLongPtrA(GetShellWindow(), GWLP_WNDPROC);
    ok (ret == 0, "Should return NULL\n");
    ok (GetLastError() == ERROR_ACCESS_DENIED, "Wrong return error!\n");
    SetLastError(0xfeedf00d);
    ret = GetWindowLongPtrW(GetShellWindow(), GWLP_WNDPROC);
    ok (ret == 0, "Should return NULL\n");
    ok (GetLastError() == ERROR_ACCESS_DENIED, "Wrong return error!\n");
    SetLastError(0xfeedf00d);
    ret = GetWindowLongPtrA(GetShellWindow(), GWLP_WNDPROC);
    ok (ret == 0, "Should return NULL\n");
    ok (GetLastError() == ERROR_ACCESS_DENIED, "Wrong return error!\n");
    SetLastError(0xfeedf00d);
    ret = GetWindowLongPtrW(GetShellWindow(), GWLP_WNDPROC);
    ok (ret == 0, "Should return NULL\n");
    ok (GetLastError() == ERROR_ACCESS_DENIED, "Wrong return error!\n");
}

Referenced by START_TEST().

test_wndproc()

static void test_wndproc ( void  )

static

Definition at line 76 of file WndProc.c.

{
    WNDCLASSA cls;
    ATOM clsAtom;
    HWND hwndMain;
 
    cls.style = CS_DBLCLKS;
    cls.lpfnWndProc = redraw_window_procA;
    cls.cbClsExtra = 0;
    cls.cbWndExtra = 0;
    cls.hInstance = GetModuleHandleA(NULL);
    cls.hIcon = NULL;
    cls.hCursor = LoadCursorA(NULL, IDC_ARROW);
    cls.hbrBackground = GetStockObject(WHITE_BRUSH);
    cls.lpszMenuName = NULL;
    cls.lpszClassName = "RedrawWindowClass";
 
    clsAtom = RegisterClassA(&cls);
    ok(clsAtom != 0, "RegisterClassA() failed: LastError = %lu\n", GetLastError());
 
    if (clsAtom == 0)
    {
        skip("No Class atom\n");
        return;
    }
 
    hwndMain = CreateWindowA(cls.lpszClassName, "Main Window", WS_OVERLAPPEDWINDOW,
                             CW_USEDEFAULT, 0, 100, 100, NULL, NULL, NULL, NULL);
 
    ok(hwndMain != NULL, "CreateWindowA() failed: LastError = %lu\n", GetLastError());
 
    ok(WMPAINT_count == 0,
       "Multiple unexpected WM_PAINT calls = %d\n", WMPAINT_count);
 
    if (hwndMain == NULL)
    {
        skip("No Window\n");
        ok(UnregisterClassA(cls.lpszClassName, cls.hInstance) != 0,
           "UnregisterClassA() failed: LastError = %lu\n", GetLastError());
        return;
    }
 
    ShowWindow(hwndMain, SW_SHOW);
    ok(WMPAINT_count == 0,
       "Multiple unexpected WM_PAINT calls = %d\n", WMPAINT_count);
 
    RedrawWindow(hwndMain, NULL, NULL, RDW_UPDATENOW | RDW_ALLCHILDREN);
    ok(WMPAINT_count == 1 || broken(WMPAINT_count == 0), /* sometimes on win9x */
       "Multiple unexpected WM_PAINT calls = %d\n", WMPAINT_count);
 
    redrawComplete = TRUE;
    ok(WMPAINT_count < WMPAINT_COUNT_THRESHOLD,
       "RedrawWindow (RDW_UPDATENOW) never completed (%d/%d)\n",
       WMPAINT_count, WMPAINT_COUNT_THRESHOLD);
 
    ok(DestroyWindow(hwndMain) != 0,
       "DestroyWindow() failed: LastError = %lu\n", GetLastError());
 
    ok(UnregisterClassA(cls.lpszClassName, cls.hInstance) != 0,
       "UnregisterClassA() failed: LastError = %lu\n", GetLastError());
}

Referenced by START_TEST().

Variable Documentation

redrawComplete

int redrawComplete

static

Definition at line 15 of file WndProc.c.

Referenced by redraw_window_procA(), and test_wndproc().

WMPAINT_count

int WMPAINT_count

static

Definition at line 15 of file WndProc.c.

Referenced by redraw_window_procA(), and test_wndproc().